## Summary
- Replace hardcoded CST (UTC+8) expected values in `test_time_utils.py`
with dynamically computed local-time expectations using
`time.localtime()` and `time.mktime()`
- Tests previously failed in any timezone other than UTC+8; they now
pass regardless of the system's local timezone
## Test plan
- [x] `uv run pytest test/unit_test/ -v` — 317 passed, 25 skipped
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Jim Smith <jhsmith0@me.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
### What problem does this PR solve?
- Add time utilities and unit tests
### Type of change
- [x] Refactoring
---------
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
